Create an executable file (script) as follows: $ cat > /tmp/hello.py #!/usr/bin/env python print 'Hello, world!' $ chmod a+x /tmp/hello.py Now open the file /tmp/hello.py in Emacs in graphical mode on Mac OS X. Whil in the hello.py buffer, evaluate the following expression (M-:) (file-accessible-directory-p buffer-file-name) This should return nil, because the given file is not a directory. However, this returns t. While performing the same in terminal mode, file-accessibel-directory-p returns nil for the same buffer. This is inconsistent behavior. This is affecting some extensions those use this function. In GNU Emacs 24.5.1 (x86_64-apple-darwin13.4.0, NS apple-appkit-1265.21) of 2015-04-10 on builder10-9.porkrind.org Windowing system distributor `Apple', version 10.3.1348 Configured using: `configure --with-ns '--enable-locallisppath=/Library/Application Support/Emacs/${version}/site-lisp:/Library/Application Support/Emacs/site-lisp'' Important settings: value of $LANG: en_US.UTF-8 locale-coding-system: utf-8-unix Major mode: Python Minor modes in effect: tooltip-mode: t electric-indent-mode: t mouse-wheel-mode: t tool-bar-mode: t menu-bar-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t blink-cursor-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t line-number-mode: t transient-mark-mode: t Recent messages: For information about GNU Emacs and the GNU system, type C-h C-a. user-error: Beginning of history; no preceding item [2 times] t nil Can't guess python-indent-offset, using defaults: 4 t Quit Can't guess python-indent-offset, using defaults: 4 t Load-path shadows: None found. Features: (shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util help-fns mail-prsvr mail-utils vc-git python easymenu json comint ring cl-loaddefs cl-lib ansi-color time-date tooltip electric uniquify ediff-hook vc-hooks lisp-float-type mwheel ns-win tool-bar dnd fontset image regexp-opt fringe tabulated-list newcomment lisp-mode prog-mode register page menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock font-lock syntax facemenu font-core frame cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean japanese hebrew greek romanian slovak czech european ethiopic indian cyrillic chinese case-table epa-hook jka-cmpr-hook help simple abbrev minibuffer nadvice loaddefs button faces cus-face macroexp files text-properties overlay sha1 md5 base64 format env code-pages mule custom widget hashtable-print-readable backquote make-network-process cocoa ns multi-tty emacs) Memory information: ((conses 16 80948 5235) (symbols 48 18314 0) (miscs 40 48 207) (strings 32 13377 3859) (string-bytes 1 387833) (vectors 16 10470) (vector-slots 8 385377 7455) (floats 8 54 283) (intervals 56 358 4) (buffers 960 15))